S-40A (Runs 3 and above)

Hallicrafters, The; Chicago, IL and Arlington/Grand Prairie, TX

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  • Year
  • 1949/1950
  • Category
  • Amateur-Receiver (amateur bands, may include broadcast bands)
  • Radiomuseum.org ID
  • 76619

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 9
  • Main principle
  • Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 9 AM circuit(s)
  • Wave bands
  • Broadcast, Short Wave(s) and Police.
  • Power type and voltage
  • Alternating Current supply (AC) / 105-125 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
  • Power out
  • 2.5 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: S-40A - Hallicrafters, The; Chicago,
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 470 x 229 x 279 mm / 18.5 x 9 x 11 inch
  • Notes

  • Hallicrafters S-40A (Runs 3 and above) moved the Audio Transformer from the chassis top to the bottom.  The Rectifier tube was 80 for Runs 1-2; 5Y3 for Runs 3 and above.  The Speaker wires (2) were routed through a small hole and directly soldered in circuit.

    The following table lists some of the easy-to-identify differences of the S-40A versions.

    Additional circuit differences (resistors, capacitors, wiring) are not described here; refer to the schmatics for additional differences.  Note that the "U" model used a Universal power transformer (120/240 volts; 25-60 Hz) for export. It is confirmed that the "(Runs 1-2)" model had a "U" version; it is unknown if the "(Runs 3 and above)" model had a "U" version.

    Refer to S-40 (Original) for the Guide to Identifying Hallicrafters S-40 Versions document.

    Other Original/B versions include S-40 (Original) and S-40B.

    S-40A Model Differences
    Model Tubes Rectifier
    Tube    		 Speaker
    Type    		 Speaker
    Socket/Plug    		 Audio
    Xfmr
    Location
    S-40A (Runs 1-2) 9 80 PM N
    (small hole)    		 BOTTOM
    S-40A (Runs 3 and above) 9 5Y3 PM N
    (small hole)    		 BOTTOM
    S-40AU 9 80, ? PM N
    (small hole)    		 BOTTOM

    Coverage:0.540-1.68, 1.68-5.4, 5.3-15.5, 15.5-44MHz, Same as S-40B except following Tubes: 6SL7 bfo, 6H6 det/anl/avc, 6F6 af out

    Cabinet design by Raymond Loewy.

    Included in New York's Museum of Modern Art collection.

  • Net weight (2.2 lb = 1 kg)
  • 12.1 kg / 26 lb 10.4 oz (26.652 lb)
  • Price in first year of sale
  • 90.00 $
  • Literature/Schematics (1)
  • The Spectrum Monitor, June 2020, p 83-88, Adventures in Radio Restoration [S-40] by Rich Post KB8TAD
  • Literature/Schematics (3)
  • Set 33, Folder 10, July 1948
  • Author
  • Model page created by a member from D. See "Data change" for further contributors.

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